When you have asthma and are having trouble breathing, getting your medication into your lungs quickly and efficiently means everything. If you use an MDI spacer, you'll want to switch to the PARI Vortex. No other spacer holding chamber delivers as much medication as effectively as the Vortex. Other holding chambers are made of plastic and contain a permanent electrostatic charge which attracts and holds small particles inside the chamber. But the Vortex is made of metal, so there is no static charge to interfere with your medication. The Vortex also has a special cyclonic flow pattern to help patients with low lung capacity inhale more medication.